Pipe coupling



- H March 5', 1946,

c.- DIES PIPE conning Filed Juiy 15, 1945 P rsuadin 5,1945

' couplingthrough the mediumz of .autaperedrs'leev en a ing an one ilngdn-ethereoupling which ris well as 1 thosei .subiected ,to zrvibrations ares-likely,

lfected in h in tance we n rt c larrc struc-i Myinventio v an-improvementsin pipe cou plings,- and; relates; more especiallwstor that-" type in whichcthe threadless;pipeiiis secutedsinlthe or surrounding; the::end";of the:1pipe:i and e rztsnsmd ndainto which; it ia eiflms dnu owed by somegdiilicnltyhasbfingexperienced in con of thepipe coupllngtogetherq 1, A J plinxs of this-kind;-to.= rovideea tight *lolnt thafirld For thenurps 'of j 'sm n' ioutmy invention 1 1 will highpressure.;andiiars' or-ivibra the tapered 'sleeve;orfbushing,is 'provlded'at its f tions; that ;is. tocsay coupl ngs Rofa'this enera outeriend 'wlth an outwardly proiecting' reinforce c .r h bw ent s d ln blah-pressure;lines asa ng flange IB forming alsoapaciringringand .1 with radial slots iili'extending inwardly from the, v j

iv outer end of the sleeve" a cent; distance beyond I 1.; the innerl s ide 'of*theflange so that this portlon 1 r. h a v' fidr flam m ave a cert in M, U mountfofresiliency permitting it 't'o'be c9111 1 tweenthepipe and;coupling, I I tractedwhnjsaid fsle'eve isforjcedlntoflthe' bace;

It t eL-brin r bi ctwr m .Yentlon,- 20,;betweehith' pipe andcoupling, and to' cooperate therefore, .to-solcons'truct the .eng aging -partsgqof, with this sIeeveQ ineiIectinQ-a rigid joint, the end i r the couplin'g jthatgvthey-ewill cooperate to insure -=portion:l ofitlie pipeis slightly reduced in diame y a rigidiioint fbetwe the pipe and coupling ef, ;;ter andprovided with circumferentia1indenta-' y e v I A itlons-or"'grooves""l 8-intowhichthe metalof the tion of the bushing "associated'with aparticular sleeveor bushing'is compressed by the turning of t lo se gtq' ssh Dung, and itsis e ten asetor'deyeiop leaksi 1e formation. of ithe endtofx the pipe with which it the flangednut'on'the'coupling;As'willbenoted engagea'whereby'the meeting faces of the busha shoulder is formed at the inneryend of the reing andpipewill be more intimately engagedthan, I duced portion of the pipe, andthis, shoulder j heretofore and in such manner as to resist high serves tolimit the extent to which the pipe propressure fluid conducted bythe pipe line as well Jects into the couplingbyengagement of'the end as resist vibrations and other conditions to which of the sleeve against the same, as shown'in Fig.2.-

the pipeline may -be subjected; all as hereinafter The tapered sleeve or bushing, I2, is made of describedand more specifically set forth in the malleable metal, preferably copper or brass, so

appended claim. that when it is forced into the space between In the accompanying drawing: the pipe and wall of the tapered opening part Fig. l is an elevation showing the application of the metal will be crowded into the indentaof my invention to a T-coupling, part of which tions or grooves to form engaging ribs integral is broken away to disclose the manner of conwiththesleeve-to overcome end pressure-and 1 necting the pipe thereto. in this operation it is'essential that the flanged Fig. 2 is an enlarged view. of a coupling in 40 end ofthe sleeve be permitted to slightly conwhich some of the parts thereof are in section tract,,providedfor by the aforementioned slots. to better illustrate the bushing and pipe and their Though I have shown four slots in the outer and intimate engagement with each other and with portion of the sleeve the number may be inthe coupling. 1 creased or diminished according to-the resiliency Fi 3 is a detail view of the taperedsleeve or desired, and it will be understood that the flange u hin and a a not only reinforces the outer end of the sleeve-- Fig. 4 is a detail side elevation of the end porwhere it isengagedby the flange on the nut-but tion or. the pipe which is confined within the it o forms packing ring twee th ut r 9 8, oneof e p pe in shown in end of the coupling and flange on the nut when sections y I the nut is tightened to crowd the metal of the The improvements 1. have made m y e msleeve into the indentations or grooves. in'the' ployed-in connection with anyof various types of p1pe 1t 111 be understood, also, t t t 1 pipe wui lins xa pl s bein shown in the cumferential-grooves are shallow orof sumcient drawing-in each instance the body portion or depth to not only cooperate with the euzagement coupling vIII being provided with the usual tapered '65 or the inner surface of the sleeve with the tooled end of the pipe, for sealing the pipe within the coupling, but also serves to overcome loosening of the parts of the coupling under the stress of vibrations or end pressure when the pipe line is used for conducting fluid under-high pressure.

In addition to shaping that portion of the pipe which is confined within the coupling in the able coupling for use inhigh pressure pipe lines.

From the foregoing description it will be obvious that when the parts of the coupling are as sembled the initial tightening otthe' flanged nut will exert pressure on the 'taperedvsleeve to bind it between the pipe and coupling member, and that further tightening of the nut will draw-the pipe into the coupling member to an extent limited by theshoulderat the inner end of the reduced portion of the pipe and coincidentally cause iecting the rigidity of the connection between thepipe and coupling, and in tests I have made it has been found that a single indentation or groove, II, in the pipe will answer the purpose as well as two. When a single groove is used it should be approximately one-eighth of an inch wide and five thousandths of an inch deep; in other words, the groove or grooves must be of a depth and width to insure the crowding oi aipart oi. the'malleable metal of the. sleeve into the groove or grooves-to provide an integral rib or ribs that will aid the contiguous engaging surfaces of sleeve and pipe in resisting end pressure. Other such modifications or changes may be made within the spirit and scope of the claim.

I' claim:

i A coupling for pipe lines adapted to conduct high pressure fluid comprising a coupling member'having tapered openings therein to receive the malleable metal of the sleeve to expand or crowd into the indentations or grooves in the pipe,

while the flange at the outer end of the.sleeve slightly contracted during this operation-will be clamped between the end of the coupling and flange within the outer end of the nut. By reason of my improvements, therefore, a rigid connection of the parts is efiected, and the use of copper-or other malleable metal of this g'eneralcharacterin making the sleeve will establish an unyielding engagement between the sleeve and pipe to eil'ectually resist end pressure as well as provide a strong joint, whereby the coupling is well adapted to meet various conditions that may be anticipated in the installation 01' pipe lines requiring a n firm and secure Joint.

- I have already mentioned some obvious modiflcations or changes which may be made in the practice of my invention without materially atpipes to be connected thereto, malleable "metal" sleeves interposed between the ends 'oith'e" pipes and body of the coupling member; the sleeveih each instancelbeing provided withan external flange at. its outer endto-tormapaclr'ing ring in connection with the coupling'member' and having a plurality of slits extending; longitudinally through the flange and for a short distance into the body of the, sleeve to permit'ot slight con v traction of the outer end'of the latter in coupling the pipe thereto;lthe--pipe having'lts outer end I portion reduced in diameter corresponding with a the internal diameter-oi the sleeve and length or the same to provide a smooth circumference with a shoulder at the'inner end thereof, andsaid pipe having circumferential grooves in the reduced Portion into which metal oithe malleable metal sleeve is crowded'to form integral ribsgon the sleeve engaging the grooves in the'pipe to] resis't end pressure; together with flanged nuts connecting the pipes to the coupling member and engaging the outer ends oithe sleeves for compressing the sleeves by engagement with the" flange at the outer'end oi. each sleevel campus "a. pres. 

